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/* $Id: man_hash.c,v 1.1 2009/04/06 20:30:40 kristaps Exp $ */
/*
* Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "libman.h"
/* ARGUSED */
void
man_hash_free(void *htab)
{
free(htab);
}
/* ARGUSED */
void *
man_hash_alloc(void)
{
int *htab;
int i, j, x;
htab = calloc(26 * 5, sizeof(int));
if (NULL == htab)
return(NULL);
for (i = 1; i < MAN_MAX; i++) {
x = man_macronames[i][0];
assert((x >= 65 && x <= 90) ||
(x >= 97 && x <= 122));
x -= (x <= 90) ? 65 : 97;
x *= 5;
for (j = 0; j < 5; j++)
if (0 == htab[x + j]) {
htab[x + j] = i;
break;
}
assert(j < 5);
}
return((void *)htab);
}
int
man_hash_find(const void *arg, const char *tmp)
{
int x, i, tok;
const int *htab;
htab = (const int *)arg;
if (0 == (x = tmp[0]))
return(MAN_MAX);
if ( ! ((x >= 65 && x <= 90) || (x >= 97 && x <= 122)))
return(MAN_MAX);
x -= (x <= 90) ? 65 : 97;
x *= 5;
for (i = 0; i < 5; i++) {
if (0 == (tok = htab[x + i]))
return(MAN_MAX);
if (0 == strcmp(tmp, man_macronames[tok]))
return(tok);
}
return(MAN_MAX);
}
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